Multi-stage seawater desalination circulating device

Abstract

The utility model discloses a multistage seawater desalination circulating device, and particularly relates to the technical field of seawater desalination circulation, the multistage seawater desalination circulating device comprises a supporting seat, a plurality of electrodialysis boxes which are sequentially arranged are fixedly arranged at the top of the supporting seat, and a plurality of cation exchange membranes and a plurality of anion exchange membranes are arranged in each electrodialysis box. Two connecting assemblies used for being communicated with the electrodialysis box are arranged at the rear end of the supporting seat, a lifting assembly is arranged at the top of the supporting seat and comprises a lifting plate, and two electric push rods are fixedly arranged at the bottoms of the two sides of the lifting plate. According to the utility model, the plurality of electrodialysis boxes are integrated on the supporting seat and are communicated and matched together through the connecting components, so that seawater can be subjected to multi-stage circulating desalination treatment, the purity of fresh water can be improved, and the lifting plate is driven to lift by virtue of the electric push rod; and the cation exchange membrane and the anion exchange membrane are driven to automatically lift out of the electrodialysis box, so that great convenience can be brought to subsequent disassembly and maintenance.

Description

TECHNICAL FIELD

[0001] The utility model relates to sea water desalination circulating technical field more specifically, it is a kind of multistage sea water desalination circulating device. BACKGROUND

[0002] About 97% of the world's water resources are seawater, while only about 2.5% of fresh water resources are available for direct human use. With the acceleration of population growth, industrialization and urbanization, the demand for fresh water is rising, and seawater desalination has become an effective way to open up new water sources and alleviate the fresh water crisis. Seawater desalination is a process that uses physical, chemical or biological methods to remove salt and other impurities from seawater to obtain fresh water that can be used by humans. This technology is crucial to alleviating the global water shortage problem, especially in coastal arid areas, and is particularly significant. Traditional seawater desalination methods mainly include distillation and reverse osmosis. Among them, the distillation method is to pass the heated seawater through multiple pressure reduction evaporation chambers in turn. The seawater rapidly depressurizes and evaporates in the evaporation chamber to produce water vapor. The water vapor is condensed to become fresh water. The seawater that has not evaporated enters the next evaporation chamber for continuous evaporation, forming a cycle.

[0003] For example, the prior art with publication number CN217297356U discloses a seawater desalination device. The utility model utilizes an evaporator to achieve efficient photo-thermal conversion and effectively filter impurities and bacteria in seawater. With the condenser arranged between adjacent evaporators, the efficiency of condensing steam is improved, the water production is increased, and the energy loss is reduced. The condenser provides protection for the internal structure of the device and also plays a role in focusing sunlight in multiple directions, improving energy utilization.

[0004] However, the above-mentioned prior art has the following problems when in use: in the process of desalinating seawater by distillation, the seawater desalination efficiency will change due to the influence of solar intensity, so the seawater desalination process is unstable, and the purity of the distilled water is low. Based on this, the utility model provides a multistage seawater desalination circulating device with high fresh water purity. UTILITY MODEL CONTENTS

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a multistage seawater desalination circulating device. By integrating multiple electrodialysis tanks on the support seat, the multiple electrodialysis tanks are connected together by a connecting assembly and cooperate with each other, which can perform multistage circulating desalination treatment on seawater, thereby improving the purity of fresh water. With the help of the electric push rod driving the lifting plate to lift, the cation exchange membrane and the anion exchange membrane are automatically lifted out of the electrodialysis tank, thereby greatly facilitating subsequent disassembly and maintenance, and solving the problems in the above-mentioned background technology.

[0006] To achieve the above object, the utility model provides the following technical scheme: A multistage seawater desalination circulating device, including support base, a plurality of of electric dialysis tank is fixed in sequence on the top of support base, a plurality of cation exchange membrane and a plurality of anion exchange membrane are equipped in each electric dialysis tank, the rear end of support base is equipped with two connecting components for connecting electric dialysis tank, the top of support base is equipped with lifting assembly, lifting assembly includes lifting plate, two electric push rods are fixed in the bottom of both sides of lifting plate, the bottom of electric push rod is fixed with support base, the bottom of lifting plate is fixed with a plurality of fixed frame for fixing cation exchange membrane and anion exchange membrane.

[0007] In a preferred embodiment, the bottom of each electric dialysis tank is fixed with a liquid inlet pipe, and a fresh water drain pipe and a concentrated water drain pipe are arranged above each electric dialysis tank for discharging treated fresh water and concentrated water respectively.

[0008] In a preferred embodiment, the connecting component includes a water pump, which is connected to the fresh water drain pipe and the liquid inlet pipe of the adjacent two electric dialysis tanks through the upper communication pipe and the lower communication pipe, for connecting three electric dialysis tanks to realize the circulation treatment of seawater.

[0009] In a preferred embodiment, the plurality of cation exchange membranes and the plurality of anion exchange membranes are arranged alternately in the electric dialysis tank, and a negative electrode and a positive electrode are fixed on the inner walls of the front and rear sides of each electric dialysis tank, and a direct current electric field is generated by using the negative electrode and the positive electrode to promote the separation efficiency of ions in seawater.

[0010] In a preferred embodiment, a plurality of receiving grooves are formed in the top of the support base, and a plurality of liquid inlet pipes are arranged in the receiving grooves to avoid the influence of the support base on the laying of the liquid inlet pipes.

[0011] In a preferred embodiment, a photovoltaic solar panel is fixed on the top of the lifting plate, and the number of photovoltaic solar panels is two, which can absorb solar energy to generate electricity, thereby reducing the power consumption of the device.

[0012] The technical effects and advantages of the utility model are as follows:

[0013] The utility model integrates a plurality of electric dialysis tanks on the support base, and the plurality of electric dialysis tanks are connected together through the connecting component to cooperate with each other, which can perform multistage circulating desalination treatment on seawater, thereby improving the purity of fresh water, and the electric push rod drives the lifting plate to lift, which drives the cation exchange membrane and the anion exchange membrane to automatically lift out of the electric dialysis tank, thereby greatly facilitating the subsequent disassembly and maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1The whole structure schematic view of the utility model;

[0015] Figure 2 The whole structure rear view of the utility model;

[0016] Figure 3 The whole structure side view of the utility model;

[0017] Figure 4 The electrodialysis tank, fresh water drain pipe and concentrated water drain pipe schematic view of the utility model;

[0018] Figure 5 The electrodialysis tank internal structure schematic view of the utility model.

[0019] The figure mark is: 1, support seat, 2, electrodialysis tank, 3, cation exchange membrane, 4, anion exchange membrane, 5, connecting assembly, 6, lifting assembly, 7, liquid inlet pipe, 8, fresh water drain pipe, 9, concentrated water drain pipe, 10, negative electrode, 11, positive electrode, 12, storage groove, 13, photovoltaic solar panel,

[0020] Water pump, 52, upper communication pipe, 53, lower communication pipe,

[0021] 61, lifting plate, 62, electric push rod, 63, fixed frame. Specific implementation

[0022] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model, obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the scope of protection of the utility model.

[0023] Refer to the description attached Figures 1-5 The utility model provides a kind of multistage seawater desalination circulating device, including support seat 1, the support seat 1 top is fixed with a plurality of electrodialysis tank 2 in sequence, each electrodialysis tank 2 inside is equipped with a plurality of cation exchange membrane 3 and a plurality of anion exchange membrane 4, a plurality of cation exchange membrane 3 and a plurality of anion exchange membrane 4 are arranged in electrodialysis tank 2 alternatively, each electrodialysis tank 2 front and rear two sides inner wall is fixed with negative electrode 10 and positive electrode 11, the common material of negative electrode 10 is stainless steel etc., in the process of electrodialysis, negative electrode 10 occurs reduction reaction, and the cation in solution is attracted to it, and positive electrode 11 is usually made of material with good corrosion resistance and conductivity, such as titanium coated ruthenium electrode, in the process of electrodialysis, positive electrode 11 occurs oxidation reaction, and the anion in solution is attracted to it.

[0024] Next, an inlet pipe 7 is fixedly installed through the bottom of each electrodialysis tank 2, and a freshwater drain pipe 8 and a concentrated water drain pipe 9 are provided above each electrodialysis tank 2. Two connecting components 5 for connecting the electrodialysis tank 2 are provided at the rear end of the support base 1. Specifically, the connecting component 5 includes a water pump 51, which is detachably fixed to the electrodialysis tank 2. The water pump 51 is connected to the freshwater drain pipe 8 and the inlet pipe 7 on the two adjacent electrodialysis tanks 2 through an upper connecting pipe 52 and a lower connecting pipe 53. The water pump 51 can be connected to the electrodialysis tank 2 with bolts. The upper connecting pipe 52 can be a metal flexible hose, which can be stretched to a certain extent.

[0025] In actual use, seawater flows through the rightmost side of support 1 ( Figure 2 Multiple inlets (one inlet per group between cation exchange membrane 3 and anion exchange membrane 4) on the rightmost inlet pipe 7 are fed into the electrodialysis tank 2. As seawater fills the electrodialysis tank 2 from bottom to top, the cathode 10 and anode 11 on the front and rear sides of the electrodialysis tank 2 generate a direct current electric field. Under the influence of this field, cations in the seawater pass through the cation exchange membrane 3 towards the cathode, and anions pass through the anion exchange membrane 4 towards the anode. The ion concentration in the seawater between the cation exchange membrane 3 and the silver ion exchange membrane 4 decreases, gradually becoming freshwater, while the ion concentration on both sides of the cation exchange membrane 3 and the silver ion exchange membrane 4 gradually increases, gradually becoming concentrated water (concentrated brine). This process desalinates and concentrates the seawater in adjacent compartments, respectively. Figure 4 As shown, the vertical conduits at the lower ends of the freshwater drain pipe 8 and the concentrated water drain pipe 9 enter different areas (the vertical conduit at the lower end of the freshwater drain pipe 8 enters the freshwater area, while the vertical conduit at the lower end of the concentrated water drain pipe 9 enters the concentrated water area), thus separating the freshwater and concentrated water and realizing the cyclical treatment of seawater desalination.

[0026] like Figure 4 As shown, the lower ends of the freshwater drain pipe 8 and the concentrated water drain pipe 9 are equipped with vertical guide pipes, the lower ends of which are placed inside the electrodialysis tank. As the electrodialysis process proceeds, freshwater is continuously drawn in by the freshwater drain pipe 8, the upper connecting pipe 52, and the water pump 51 and transported to the next electrodialysis tank 2 for further treatment. Concentrated water is drawn out by the concentrated water drain pipe 9. After seawater passes through multiple electrodialysis tanks 2, the purity of the freshwater can be greatly improved.

[0027] Refer to the instruction manual appendix Figures 1-5The top of the support base 1 is provided with a lifting assembly 6, the lifting assembly 6 comprises a lifting plate 61, two electric push rods 62 are fixedly arranged at the bottom of the lifting plate 61 on both sides, the bottom of the electric push rod 62 is fixed with the support base 1, a plurality of fixing frames 63 for fixing the cation exchange membrane 3 and the anion exchange membrane 4 are fixedly arranged at the bottom of the lifting plate 61, the cation exchange membrane 3 and the anion exchange membrane 4 are lifted out of the electrodialysis tank 2 by driving the lifting plate 61 through the electric push rod 62, meanwhile, the fresh water drain pipe 8 and the concentrated water drain pipe 9 are fixed at the bottom of the lifting plate 61, the fresh water drain pipe 8 and the concentrated water drain pipe 9 are lifted together with the lifting plate 61, so that the staff can quickly disassemble and maintain. Figure 2 As shown in the figure, the water pump 51 is fixed on the electrodialysis tank 2, the upper communication pipe 52 is a metal hose, when the fresh water drain pipe 8 and the concentrated water drain pipe 9 are lifted, the upper communication pipe 52 is stretched or bent.

[0028] The top of the support base 1 is provided with a lifting assembly 6, the lifting assembly 6 comprises a lifting plate 61, two electric push rods 62 are fixedly arranged at the bottom of the lifting plate 61 on both sides, the bottom of the electric push rod 62 is fixed with the support base 1, a plurality of fixing frames 63 for fixing the cation exchange membrane 3 and the anion exchange membrane 4 are fixedly arranged at the bottom of the lifting plate 61, the cation exchange membrane 3 and the anion exchange membrane 4 are lifted out of the electrodialysis tank 2 by driving the lifting plate 61 through the electric push rod 62, meanwhile, the fresh water drain pipe 8 and the concentrated water drain pipe 9 are fixed at the bottom of the lifting plate 61, the fresh water drain pipe 8 and the concentrated water drain pipe 9 are lifted together with the lifting plate 61, so that the staff can quickly disassemble and maintain.

[0029] As shown in the figure, the top of the lifting plate 61 is fixedly provided with a photovoltaic solar panel 13, the number of the photovoltaic solar panel 13 is two, the photovoltaic solar panel 13 absorbs solar energy through photoelectric conversion to generate electric energy, which is used for power supply of the device, so that the power consumption of the device can be reduced. Figures 1-2

[0030] Finally: the above only for preferred embodiments of the present application, and not for limiting the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included in the protection scope of the present application.​

Claims

1. A multi-stage seawater desalination circulation device, comprising a support base (1), characterized in that: The top of the support base (1) is fixed with multiple electrodialysis boxes (2) arranged in sequence. Each electrodialysis box (2) is equipped with multiple cation exchange membranes (3) and multiple anion exchange membranes (4). The rear end of the support base (1) is provided with two connecting components (5) for connecting the electrodialysis boxes (2). The support base (1) is provided with a lifting assembly (6) at the top. The lifting assembly (6) includes a lifting plate (61). Two electric push rods (62) are fixedly provided on the bottom of both sides of the lifting plate (61). The bottom of the electric push rods (62) is fixed to the support base (1). Multiple fixing frames (63) for fixing the cation exchange membrane (3) and the anion exchange membrane (4) are fixedly provided at the bottom of the lifting plate (61).

2. The multi-stage seawater desalination circulation device according to claim 1, characterized in that: Each electrodialysis tank (2) has a liquid inlet pipe (7) fixedly running through its bottom. Each electrodialysis tank (2) has a fresh water drain pipe (8) and a concentrated water drain pipe (9) above it. The lower ends of the fresh water drain pipe (8) and the concentrated water drain pipe (9) have vertical guide pipes, and the lower ends of the vertical guide pipes are placed inside the electrodialysis tank (2). The lower end of the fresh water drain pipe (8) enters the fresh water area, and the lower end of the concentrated water drain pipe (9) enters the concentrated water area.

3. The multi-stage seawater desalination circulation device according to claim 2, characterized in that: The connecting assembly (5) includes a water pump (51), which is connected to the freshwater drain pipe (8) and liquid inlet pipe (7) on two adjacent electrodialysis tanks (2) through an upper connecting pipe (52) and a lower connecting pipe (53).

4. The multi-stage seawater desalination circulation device according to claim 1, characterized in that: Multiple cation exchange membranes (3) and multiple anion exchange membranes (4) are arranged alternately in the electrodialysis tank (2). Each electrodialysis tank (2) has a cathode (10) and a cathode (11) fixed on the inner walls of the front and rear sides.

5. A multi-stage seawater desalination circulation device according to claim 2, characterized in that: The top of the support base (1) has a number of storage slots (12) equal to the number of liquid inlet pipes (7), and the multiple liquid inlet pipes (7) are respectively located in the multiple storage slots (12).

6. The multi-stage seawater desalination circulation device according to claim 1, characterized in that: The top of the lifting plate (61) is fixedly equipped with a photovoltaic solar panel (13), and there are two photovoltaic solar panels (13).

7. A multi-stage seawater desalination circulation device according to claim 3, characterized in that: The upper connecting pipe (52) is a metal flexible tube.

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